FEATURED ARTICLE
-
08.12.11
Read more...Add a comment
Much to the chagrin of right wing proponents, and for that matter, to anyone in valiant support of the dogma of big business health as a key driver of economic wellbeing, the Occupy Wall Street protests continue to rage on full throttle. In the refuge of Zucotti Park, NY, shaggy-haired collegiates and other such interesting folks inclined to support high levels of government intervention have remained steadfast in their opposition of all things Wall Street.
28 December 2011
By Hugh Edmundson, Carnegie Mellon University
Arbitrage-free pricing is the primary means of determining the fair value of a security. The principle of arbitrage-free pricing essentially boils down to the claim that you cannot earn something from nothing without assuming some risk.
The concept of arbitrage is historically associated with price differentials between markets. As a (simplified) example, when the price of a good such as timber was lower in Market A than in Market B, merchants would purchase the timber at the lower price in Market A, transport the goods to Market B, then sell the timber at Market B for a higher price. Since prices were relatively stable, merchants could incur a risk-free profit, less the costs of transport, by simply moving goods from where they were more plentiful to where they were less plentiful. The merchants would then earn a profit based on the price difference. Over the long term, such merchants' actions would cause the two independent market prices to converse to an equilibrium.





